docstr: Fit is not supported in OpenVINOEstimator
docstr_tok: ["Fit","is","not","supported","in","OpenVINOEstimator"]
code: def fit(
      self,
      data,
      epochs,
      batch_size=32,
      feature_cols=None,
      label_cols=None,
      validation_data=None,
      checkpoint_trigger=None,
  ):
      """
      Fit is not supported in OpenVINOEstimator
      """
      raise NotImplementedError
  
imports: import math
  import os.path
  from pyspark.sql import DataFrame
  from zoo.orca.data import SparkXShards
  from zoo.orca.learn.spark_estimator import Estimator
  from zoo import get_node_and_core_number
  from zoo.util import nest
  from zoo.common.nncontext import init_nncontext
  from openvino.inference_engine import IECore
  import numpy
label_desc: Use image node_id 2 for calling the OpenvinoEstimator obj's underlying member method code with example usage: obj.fit(data, epochs, batch_size, feature_cols, label_cols, validation_data, checkpoint_trigger) without return types